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Aimani, A. E., Houari, A., Laasli, S., Mentag, R., Iraqi, D., Diria, G., Khayi, S., Lahlali, R., Dababat, A. A., & Mokrını, F. (2022). Antagonistic potential of Moroccan entomopathogenic nematodes against root-knot nematodes, Meloidogyne javanica on tomato under greenhouse conditions. Scientific Reports, 12, 2915. https://doi.org/10.1038/s41598-022-07039-0
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The root-knot nematode, Meloidogyne javanica is a devastating pest affecting tomato production worldwide. Entomopathogenic nematodes (EPNs) are considered very promising biocontrol agents that could be used to effectively manage plant-parasitic nematode. The antagonistic activity of five EPN strains isolated from different fields in Morocco was evaluated against juvenile (J2s) antagonism in soil, the number of egg masses, and the galling index of M. javanica and J2s reproduction in the root. In greenhouse experiments, Steinernema feltiae strains (EL45 and SF-MOR9), Steinernema sp. (EL30), and those of Heterorhabditis bacteriophora (HB-MOR7 and EL27) were applied to the soil alongside RKN J2s. There was a significant reduction in M. javanica densities in the soil and roots by EPNs treatments when compared to the positive control. The EPNs decreased both egg masses formation and galling index by 80% compared to the positive control. The application of EPNs at a rate of 50 and 75 infective juveniles (IJs) cm−2 gave significant control of all studied nematological parameters compared to the positive control, which confirmed the importance of the doses applied. The applied dose was significantly correlated with M. javanica parameters according to polynomial regression models. The results also showed that S. feltiae strain (EL45) significantly increased plant height and root length, while H. bacteriophora strain (HB-MOR7) only enhanced root fresh weight. Therefore, both indigenous EPN strains; EL45 and SF-MOR9 have eco-friendly biological potential against M. javanica in vegetable crops.
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Journal
Scientific Reports
Journal volume
12
Journal issue
Article number
2915
Place of Publication
London (United Kingdom)
Publisher
Nature Publishing Group
Donor or Funder
Ministry of Higher Education, Scientific Research and Professional Training, Morocco
CGIAR Trust Fund
CGIAR Trust Fund
Related Datasets
CGIAR
Initiative
Plant Health
Impact Area
Nutrition, health & food security
Action Area
Resilient Agrifood Systems